CN116587148A - A polishing device and polishing method for sliding seat ball groove - Google Patents

Abstract

The invention discloses a polishing device for ball grooves of a sliding seat and a polishing method thereof. The device comprises a shell, an insert, an ejector, a polishing rod, a ball screw, a guide ball and a limit rod. Through the bead screw set inside the polishing assembly, the jacking force exerted on the ejector can be precisely controlled, and the jacking force can push the ejector out and transfer it to the polishing rod, pushing the four polishing rods against the slide On the four ball grooves of the slide seat, through the reaction force between the four polishing rods and the four ball grooves of the slide seat, the jacking force from the bead screw is adaptively adjusted and evenly shared, so that the force is relatively constant during the polishing process and can be used The four ball grooves are subjected to the same polishing force, which is beneficial to maintain the consistency of the polishing effect, thereby improving the quality of the slide seat; at the same time, guide balls are used for guidance, so as to ensure the sliding track and reduce the friction when the ejector slides force, further improving the polishing quality of the ball groove in the slide seat.

Description

A polishing device and polishing method for sliding seat ball groove

technical field

The invention relates to a polishing device and process, in particular to a polishing device and a polishing method for a sliding seat ball groove.

Background technique

Linear guide rails, also known as slide rails, linear guide rails, and linear slide rails, are used to support and guide moving parts to perform reciprocating linear motion in a given direction. Under the same volume of moving components, they have higher rated load and motion accuracy than linear bearings. , and can bear a certain torque load at the same time. Linear guide rails can be used for heavy-duty handling in horizontal space, precise positioning movement and precise guiding movement in vertical space, realizing reliable movement in a small space, and are widely used in machine tools, electronic appliances, medical treatment, and robot industries .

As the most important and core moving part of the linear guide, the sliding seat directly affects the motion accuracy and service life of the linear guide. The sliding seat is generally composed of balls, ball retainers, ball return grooves, ball grooves, etc. The main principle Through ball grooves, ball return grooves, ball retainers and other structures to make the steel ball row move circularly, so as to realize the low-friction linear motion of the slide seat on the slide rail, and during the sliding process of the slide seat on the slide rail, the balls The groove will continue to receive the reaction force of the ball. Therefore, the machining accuracy of the ball groove in the slider directly affects the motion accuracy and service life of the slider. In order to improve the machining accuracy of the ball groove of the slider, it needs to be polished.

The existing device for polishing the ball grooves of the slide seat usually polishes the four ball grooves on the slide seat respectively through the external pressure applied on the polishing rod, but since the polishing directions of the four ball grooves of the slide seat are different, During the polishing process, the positioning of the polishing rod is difficult, and the polishing force is difficult to achieve uniformity, resulting in different polishing effects for different ball grooves of the same slide.

Contents of the invention

The embodiment of the present application solves the problem in the prior art that polishing four ball grooves separately leads to different polishing effects of the same slider and different ball grooves by providing an internal automatic method to apply equal polishing force to four polishing rods at the same time. The problem is that the ball grooves of the same sliding seat can be polished at the same time with equal force, thereby improving the polishing effect.

An embodiment of the present application provides a polishing device for a ball groove of a slider, including a polishing assembly, which includes:

A shell, the upper and lower sides of the shell are provided with polishing support parts, and the front and rear sides of the polishing support part are respectively provided with a housing guide groove;

An insert, the insert is fixed on the right side inside the housing; the insert includes:

The insert polishing groove opened on the upper and lower edges of the right side, the insert limit groove opened on the front and rear sides at the same height as the insert polishing groove, the insert limit hook arranged at the left upper and lower edges, A number of insert ejection screw holes opened in the middle part of the right side and insert guide grooves opened on the upper and lower sides corresponding to the position of the housing guide groove;

An ejector, the ejector is slidably arranged on the left side inside the housing; the ejector includes:

The ejection polishing groove opened at the upper and lower edges of the left side and symmetrical to the polishing groove of the insert, the ejection limiting groove opened on the front and rear sides at the same height as the ejection polishing groove, and the upper and lower sides of the right side. The ejection limit hook at the edge and cooperating with the insert limit hook and the ejection guide groove opened on the upper and lower sides to communicate with the insert guide groove and have the same shape and direction;

Four polishing rods are respectively inserted into the insert polishing groove and the ejection polishing groove;

Bead screws are arranged in the ejection screw holes of several inserts and withstand the ejection parts;

A number of guide balls are arranged in the cavity formed by the guide groove of the insert, the guide groove of the ejector and the guide groove of the shell, and are used to limit the trajectory of the ejector when sliding;

Four limit rods are arranged in the insert limit groove and the ejection limit groove, and are used to limit the forward and backward displacement of the polishing rod.

As some embodiments of the present application, the middle part of the front and rear sides of the housing is provided with a limit installation part, and the inner side of the limit installation part is provided with a mounting groove, and the middle part of the front and rear sides of the insert is provided with a The mounting groove matches the mounting part of the insert.

As some embodiments of the present application, the two ends of the limiting rod have different diameters, and the end with a larger diameter is placed on one side of the insert.

As some embodiments of the present application, there are mounting screw holes in the middle of the front and rear sides of the insert, and mounting holes corresponding to the positions of the mounting screw holes are opened on the front and rear sides of the housing, and the insert passes through The mounting holes and the mounting bolts threaded into the mounting screw holes are fixed on the right side inside the housing.

As some embodiments of the present application, an avoidance groove for avoiding the mounting bolt is formed on the right side of the limit rod.

As a preference of some embodiments of the present application, the number of screw holes for ejecting the insert is three, and correspondingly, the number of the ball screw is also three.

The embodiment of the present application also discloses a method for polishing the ball groove of a slider. The method adopts any one of the polishing devices for the ball groove of a slider described above for polishing, and includes the following steps:

1. Assembling the polishing device: first screw the bead screw into the ejection screw hole of the insert, then match the limit hook of the insert with the limit hook of the ejection, and insert two polishing rods into the insert polishing groove of the insert , and then insert the insert and the ejector part into the shell, and then insert an appropriate number of guide balls, then insert two polishing rods into the insert polishing groove of the ejector, and then insert the insert and the ejector Fully insert into the shell, and then insert the four limit rods into the insert limit groove and the ejection limit groove, so as to limit the forward and backward movement of the polishing rod, and finally form the polishing assembly;

2. Adjustment of polishing intensity: by adjusting the locking force of the wave bead screw, control the force exerted by the wave bead screw on the ejector, so as to adjust to an appropriate polishing intensity;

3. Polishing: first fix the polishing component, then manually press the ejector into the shell, and at the same time put the sliding seat on the outside of the polishing component, and then release the ejector so that the ejector is outward under the action of the bead screw Ejection, so that the four polishing rods contact the four ball grooves of the slider, and then apply force to make the slider move back and forth, so that the ball grooves are polished with the polishing rods; or:

First fix the sliding seat, then manually press the ejector into the shell, insert the polishing assembly into the sliding seat at the same time, and then release the ejector, so that the ejector is ejected outward under the action of the bead screw, so that The four polishing rods are in contact with the four ball grooves of the slide seat, and then force is applied to make the polishing assembly move back and forth, so that the ball grooves are polished with the polishing rods.

The wave bead screw used in the above process is composed of a spring, a steel ball (or stainless steel column head), and a shell. A cylindrical sleeve is opened inside the shell to accommodate the spring and the steel ball (or stainless steel column head). For positioning, the spring can provide axial jacking force.

One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

1. Good polishing effect. Through the bead screw set inside the polishing assembly, the jacking force exerted on the ejector can be precisely controlled, and the jacking force can push the ejector out and transfer it to the polishing rod, pushing the four polishing rods against the slide On the four ball grooves of the seat, through the reaction force between the four polishing rods and the four ball grooves of the slide seat, adaptively adjust and evenly share the top force from the ball screw, so that the polishing force is relatively constant and the four balls The grooves are subjected to the same polishing force at the same time, which is conducive to maintaining the consistency of the polishing effect and improving the quality of the slide seat; at the same time, the sliding of the ejector is guided by guide balls, thereby reducing the ejection while ensuring the sliding track. The friction force when the parts slide, so that the force exerted by the ball screw can be almost non-destructively transmitted to the polishing rod, which is convenient for precise control of the polishing force through the ball screw, and prevents the ejector from being stuck when sliding out, resulting in uneven polishing force Therefore, the polishing quality of the ball groove in the slide seat can be further improved.

2. Low polishing cost. During the polishing process, the force required for polishing can be automatically applied through the action of the ball screw and the guide ball, and no external force is required to ensure the stability and uniformity of the force in the polishing process. The applied force can be self-adapted and evenly distributed, without positioning through the external structure, eliminating the process of positioning and controlling the polishing force during the polishing process, effectively reducing the complexity of the polishing process, thereby effectively reducing the cost of polishing.

3. The applicability of the device is high. Through the setting of the insert limit hook and the ejection limit hook, it is avoided that the ejector is separated from the shell when the polishing device is not in use, which is convenient for the use and storage of the polishing device; at the same time, due to the insert limit hook and the ejection limit There is a certain stroke between the hooks, and the applied force can be adjusted by adjusting the ball screw, so the polishing assembly can polish slide seats with different ball groove sizes within a certain range, which increases the applicability of the polishing device.

4. The device is easy to use. Through the cooperation between the installation groove and the mounting part of the insert, it is convenient for positioning when the insert is fixedly installed to the shell; the limit rod is clamped by the insert, so that the limit rod will not be easily disengaged, and at the same time, the ejector will not be in contact with the ejector during the sliding process The contact of the limit rod avoids additional friction during the sliding process of the ejector; the connection is fixed through the installation bolt, which is convenient for installation and convenient for the subsequent replacement of the polishing rod.

Description of drawings

Fig. 1 is the schematic diagram of the three-dimensional structure of the polishing process in the embodiment of the present application;

Fig. 2 is a schematic diagram of the side structure of the slide seat to be polished in the embodiment of the present application;

3 is a schematic diagram of the three-dimensional structure of the polishing assembly in the embodiment of the present application;

Fig. 4 is a schematic diagram of the exploded three-dimensional structure of the polishing assembly in the embodiment of the present application;

Fig. 5 is a partial enlarged view of place A in Fig. 4;

FIG. 6 is a schematic diagram of a three-dimensional structure of the housing in the embodiment of the present application;

Fig. 7 is a schematic diagram of the three-dimensional structure of the insert in the embodiment of the present application;

Fig. 8 is a schematic diagram of the three-dimensional structure of the ejector in the embodiment of the present application;

FIG. 9 is a three-dimensional exploded schematic diagram of the internal structure of the polishing assembly in the embodiment of the present application.

Marked in the drawings: 1-sliding seat, 11-ball groove, 2-polishing assembly, 21-installation bolt, 3-housing, 31-limit installation part, 311-installation groove, 32-polishing support part, 321- Shell guide groove, 33-mounting hole, 4-insert, 41-insert polishing groove, 42-insert limit groove, 43-insert limit hook, 44-insert ejection screw hole, 45-insert Component guide groove, 46-Insert mounting part, 47-Installation screw hole, 5-Ejector, 51-Extrusion polishing groove, 52-Ejection limit groove, 53-Ejection limit hook, 54-Ejection Guide groove, 6-polishing rod, 7-bead screw, 8-guide ball, 9-limit rod, 91-avoidance groove.

Detailed ways

The embodiment of the present application solves the problem of polishing the four ball grooves 11 separately in the prior art by providing an internal automatic method to apply equal polishing force to the four polishing rods 6 at the same time. In order to solve the problem of different effects, the ball grooves 11 of the same sliding seat 1 are polished at the same time and at the same intensity, thereby improving the polishing effect.

The technical solution in the embodiment of the present application is to solve the above-mentioned problem that the polishing effect between the different ball grooves 11 of the same slide 1 is difficult to unify. The general idea is as follows:

By setting the ball screw 7 inside the polishing assembly 2, the force is relatively constant during polishing. At the same time, the wave bead screw 7 is used to apply force from the inside to the outside, so that after the polishing assembly 2 and the slide seat 1 are matched, the four polishing rods 6 are aligned with the ball. The force exerted by the groove 11 can be self-adapted and evenly shared, so that during the polishing process, the four ball grooves 11 are subjected to the same polishing force at the same time, which is conducive to maintaining the consistency of the polishing effect; at the same time, the guide ball 8 is used for guidance, thereby reducing The frictional force during sliding is conducive to the non-destructive transmission of the force exerted by the ball screw 7 to the polishing rod 6, thereby improving the polishing effect.

In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

First embodiment:

As shown in Figures 1-9, a polishing device for a ball groove of a slide seat includes a polishing assembly 2, and the polishing assembly 2 includes:

A casing 3, the upper and lower sides of the casing 3 are provided with polishing support parts 32, and the front and rear sides of the polishing support part 32 are respectively provided with a housing guide groove 321;

An insert 4, the insert 4 is fixed on the right side inside the housing 3; the insert 4 includes:

The insert polishing groove 41 opened at the upper and lower edges of the right side, the insert limiting groove 42 opened at the same height as the insert polishing groove 41 on the front and rear sides, and the insert limiting groove 42 located at the left upper and lower edges. Position hook 43, a number of insert ejection screw holes 44 opened in the middle of the right side, and insert guide grooves 45 opened on the upper and lower sides corresponding to the position of the housing guide groove 321;

An ejector 5, the ejector 5 is slidably arranged on the left side inside the housing 3; the ejector 5 includes:

The ejection polishing groove 51 opened at the upper and lower edges of the left side and symmetrical to the insert polishing groove 41, the ejection limit groove 52 opened on the front and rear sides and the same height as the ejection polishing groove 51, is located in The ejection limit hook 53 at the upper and lower edges of the right side and cooperating with the insert limit hook 43 and the ejection guide groove opened on the upper and lower sides communicate with the insert guide groove 45 and have the same shape and direction 54;

Four polishing rods 6 are respectively inserted into the insert polishing groove 41 and the ejecting polishing groove 51;

Bead screws 7 are located in the ejection screw holes 44 of several inserts and withstand the ejection member 5;

A plurality of guide balls 8 are arranged in the cavity formed by the insert guide groove 45 and the ejection guide groove 54 and the housing guide groove 321 to limit the trajectory of the ejection member 5 when sliding;

Four limit rods 9 are arranged in the insert limit groove 42 and the ejection limit groove 52, and are used to limit the forward and backward displacement of the polishing rod 6.

The above-mentioned technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

Through the ball screw 7 arranged inside the polishing assembly 2, the jacking force applied to the ejector 5 can be precisely controlled, and the jacking force can be transmitted to the polishing rod 6 through the ejector 5, pushing the four polishing rods 6 against each other. On the four ball grooves 11 of the slider 1, through the reaction force between the four polishing rods 6 and the four ball grooves 11 of the slider 1, adaptively adjust and evenly share the top force from the ball screw 7, so that when polishing The strength is relatively constant and the four ball grooves 11 are subjected to the same polishing strength at the same time, which is beneficial to maintain the consistency of the polishing effect and improve the quality of the slide seat 1; at the same time, the sliding of the ejector 5 adopts the guide ball 8 Guided, so as to reduce the friction force when the ejector 5 slides while ensuring the sliding track, so that the force exerted by the ball screw 7 can be transmitted to the polishing rod 6 almost without damage, so that the polishing force can be precisely controlled by the ball screw 7 , to prevent the ejector 5 from being stuck when sliding out, resulting in uneven polishing process, so as to further improve the polishing quality of the ball groove 11 in the slide seat 1 .

During the polishing process, the force required for polishing can be automatically applied through the action of the ball screw 7 and the guide ball 8, and no external force is required to ensure the stability and uniformity of the force in the polishing process, and the four polishing rods 6 The force applied to the ball groove 11 can be self-adapted and evenly distributed without positioning by an external structure, eliminating the process of positioning and controlling the polishing force during the polishing process, effectively reducing the complexity of the polishing process, thereby effectively reducing the cost of polishing.

Through the setting of the insert limit hook 43 and the ejection limit hook 53, the ejector 5 is prevented from detaching from the housing 3 when the polishing device is not in use, which facilitates the use and storage of the polishing device. At the same time, since there is a certain stroke between the insert limit hook 43 and the ejection limit hook 53, and the applied force can be adjusted by adjusting the ball screw 7, the polishing assembly 2 can be used for different balls within a certain range. The sliding seat 1 with the size of the groove 11 is polished, which increases the applicability of the polishing device.

Second embodiment:

As shown in Figures 1 to 9, this embodiment further optimizes its structure on the basis of the first embodiment, specifically:

A limit installation part 31 is provided in the middle of the front and rear sides of the housing 3, and a mounting groove 311 is opened on the inner side of the limit installation part 31. The mounting groove 311 cooperates with the insert mounting portion 46 ; through the cooperation of the mounting groove 311 and the insert mounting portion 46 , the positioning of the insert 4 is facilitated when it is fixedly installed on the housing 3 .

The diameters processed at both ends of the limit rod 9 are inconsistent, and the larger diameter end is placed on the side of the insert 4; after assembly, the insert 4 can clamp the limit rod 9, so that the limit rod 9 It will not be easily disengaged, and at the same time, the ejector 5 will not be in contact with the limit rod 9 during the sliding process, so as to prevent the ejector 5 from being subjected to additional friction during the sliding process.

There are mounting screw holes 47 in the middle of the front and rear sides of the insert 4, and mounting holes 33 corresponding to the positions of the mounting screw holes 47 are opened on the front and rear sides of the housing 3, and the insert 4 passes through The mounting holes 33 and the mounting bolts 21 that are screwed into the mounting screw holes 47 are fixed on the right side of the housing 3, and at the same time, there is a hole on the right side of the limit rod 9 to avoid the mounting bolts 21. The avoidance groove 91; fixedly connected by the installation bolt 21, the installation is convenient, and at the same time, it is beneficial to the follow-up and convenient replacement of the polishing rod.

In this embodiment, considering the required polishing force and the volume of the polishing device, three insert ejection screw holes 44 are provided in the insert 4, and the corresponding number of bead screws 7 is also three.

Third embodiment:

In this embodiment, a polishing device for the ball groove of the slider in the second embodiment is used to polish the slider 1 as shown in Figure 2, specifically:

A method for polishing a ball groove of a sliding seat, comprising the steps of:

1. Assembling the polishing device: screw the bead screw 7 into the ejection screw hole 44 of the insert, and then make the insert limit hook 43 and the ejection limit hook 53 match, and the insert polishing groove of the insert 4 Insert two polishing rods 6 into 41, and then through the cooperation of the installation groove 311 and the insert mounting part 46, insert the part of the insert 4 and the ejector 5 into the shell 3, and expose the ejector 5 so that it can be inserted into the polishing rod 6. Then insert an appropriate number of guide balls 8 into the cavity formed by the insert guide groove 45, the ejection guide groove 54 and the housing guide groove 321, and then insert them into the insert polishing groove 41 of the ejector 5. Two polishing rods 6, and finally insert the insert 4 and the ejector 5 into the shell 3 completely, and then insert the four limit rods 9 from the side of the insert 4 into the insert limit groove 42 and the ejection limit In the groove 52, at last the mounting bolt 21 is screwed into the mounting screw hole 47 through the mounting hole 33 and the escape groove 91 to complete the assembly of the polishing assembly 2;

2. Adjustment of polishing intensity: adjust the locking force of the wave bead screw 7 with tools such as a screwdriver, and control the force exerted by the wave bead screw 7 on the ejector 5, so as to adjust to an appropriate polishing intensity;

3. Polishing: Fix the polishing component 2 first, then manually press the ejector 5 into the shell 3, and at the same time put the sliding seat 1 on the outside of the polishing component 2, and then release the ejector 5, so that the ejector 5 is in the Under the action of the bead screw 7, it is ejected outward, so that the four polishing rods 6 are in contact with the four ball grooves 11 of the slide seat 1, and the position of the slide seat 1 is adaptively fine-tuned, so that the polishing strength of the four ball grooves 11 is the same, and then Then, a force of back and forth reciprocating movement is applied to the sliding seat 1 , so that the ball groove 11 is polished by the polishing rod 6 .

Of course, the sliding seat 1 can also be fixed, and then the polishing assembly 2 can be moved back and forth for polishing.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (7)

1. Polishing device for a runner of a slide, comprising a polishing assembly (2), characterized in that the polishing assembly (2) comprises:

a shell (3), wherein polishing supporting parts (32) are arranged on the upper side and the lower side in the shell (3), and shell guide grooves (321) are respectively arranged on the front side and the rear side of the polishing supporting parts (32);

the insert (4) is fixedly arranged on the right side inside the shell (3); the insert (4) comprises:

insert polishing grooves (41) formed in the upper edge and the lower edge of the right side, insert limiting grooves (42) formed in the front side and the rear side and having the same height as the insert polishing grooves (41), insert limiting hooks (43) formed in the upper edge and the lower edge of the left side, a plurality of insert ejection screw holes (44) formed in the middle of the right side, and insert guide grooves (45) formed in the upper side and the lower side and corresponding to the shell guide grooves (321);

the ejection piece (5) is slidably arranged on the left side inside the shell (3); the ejector (5) comprises:

the device comprises an ejection polishing groove (51) which is arranged at the upper and lower edges of the left side and is symmetrical to the insert polishing groove (41), ejection limiting grooves (52) which are arranged at the front and rear sides and are equal in height to the ejection polishing groove (51), ejection limiting hooks (53) which are arranged at the upper and lower edges of the right side and are matched and limited with the insert limiting hooks (43), and ejection guide grooves (54) which are arranged at the upper and lower sides and are communicated with the insert guide grooves (45) and have the same shape and direction;

four polishing rods (6) respectively inserted into the insert polishing groove (41) and the ejection polishing groove (51);

the ball screw (7) is arranged in the insert ejection screw holes (44) and pushes against the ejection piece (5);

the guide balls (8) are arranged in cavities formed by the insert guide grooves (45), the ejection guide grooves (54) and the shell guide grooves (321) and are used for limiting the track of the ejection piece (5) when sliding;

and the four limiting rods (9) are arranged in the insert limiting grooves (42) and the ejection limiting grooves (52) and are used for limiting the front-back displacement of the polishing rod (6).

2. The polishing device for the ball groove of the sliding seat according to claim 1, wherein the middle parts of the front side and the rear side in the shell (3) are provided with limiting installation parts (31), one side of the limiting installation parts (31) inwards is provided with an installation groove (311), and the middle parts of the front side and the rear side of the insert (4) are provided with insert installation parts (46) matched with the installation grooves (311).

3. The polishing device for the ball groove of the sliding seat according to claim 1, wherein the diameters of the two ends of the limiting rod (9) are not uniform, and the larger diameter end is arranged on one side of the insert (4).

4. The polishing device for the ball groove of the sliding seat according to claim 1, wherein the middle parts of the front side and the rear side of the insert (4) are provided with mounting screw holes (47), the front side and the rear side of the shell (3) are provided with mounting holes (33) corresponding to the mounting screw holes (47), and the insert (4) is fixedly arranged on the right side inside the shell (3) by mounting bolts (21) penetrating through the mounting holes (33) and being connected with the mounting screw holes (47) in a threaded manner.

5. The polishing device for the ball groove of the sliding seat according to claim 4, wherein an avoiding groove (91) for avoiding the mounting bolt (21) is formed on the right side of the limiting rod (9).

6. The polishing device for the ball groove of the sliding seat according to claim 1, wherein the number of the insert ejection screw holes (44) is three, and correspondingly, the number of the ball screws (7) is also three.

7. A method for polishing a ball groove of a slide, characterized in that the polishing is performed by using the polishing apparatus for a ball groove of a slide according to any one of claims 1 to 6, comprising the steps of:

1. and (3) assembling a polishing device: firstly, screwing a bead screw (7) into an insert ejection screw hole (44), then enabling an insert limiting hook (43) to be matched with an ejection limiting hook (53), inserting two polishing rods (6) into an insert polishing groove (41) of an insert (4), then inserting parts of the insert (4) and an ejection part (5) into a shell (3), inserting a proper number of guide balls (8), inserting two polishing rods (6) into the insert polishing groove (41) of the ejection part (5), then completely inserting the insert (4) and the ejection part (5) into the shell (3), and then inserting four limiting rods (9) into the insert limiting groove (42) and the ejection limiting groove (52), so as to limit the polishing rods (6) to move forwards and backwards, and finally forming a polishing assembly (2);

2. and (3) polishing force adjustment: the locking force of the ball screw (7) is adjusted to control the force applied by the ball screw (7) to the ejection piece (5), so that the polishing force is adjusted to be proper;

3. polishing: firstly fixing a polishing assembly (2), manually pressing an ejector (5) into a shell (3), sleeving a sliding seat (1) outside the polishing assembly (2), and then releasing the ejector (5), so that the ejector (5) is outwards ejected under the action of a ball screw (7), four polishing rods (6) are in contact with four ball grooves (11) of the sliding seat (1), and then applying force to enable the sliding seat (1) to reciprocate back and forth, so that the ball grooves (11) are polished by the polishing rods (6); or:

firstly fixing a sliding seat (1), then manually pressing an ejection piece (5) into a shell (3), simultaneously inserting a polishing component (2) into the sliding seat (1), then releasing the ejection piece (5), enabling the ejection piece (5) to be ejected outwards under the action of a ball screw (7), enabling four polishing rods (6) to be in contact with four ball grooves (11) of the sliding seat (1), and then applying force to enable the polishing component (2) to reciprocate back and forth, so that the ball grooves (11) are polished by the polishing rods (6).